O.S. Engine OS22081811 Replacement Rotor Set Screw for 10FSR, 10/15/25FP, FS20, FS40, 21, 31, RE  [OS22081811]

Rotor screw specification summary

This set screw is supplied as a replacement item referenced by O.S. Engine OS22081811 and is intended for the model numbers shown in the product name. It secures the rotor to prevent axial movement on small RC powerplants.

Install this component when rebuilding or servicing the crank and rotor assembly. When correctly fitted, it maintains proper rotor position and contributes to consistent engine running characteristics.

Installation notes: verify OS22081811 against your engine documentation or supplier listing before fitting. Clean the mating threads and select the correct driver to prevent head damage. Use modest torque; over-tightening risks thread or head damage. Reinspect the seating after initial operation and retorque if necessary.

Durability note: correct fitment reduces mechanical wear associated with rotor movement and helps uphold idle stability and throttle consistency during normal use.